package cn.itcast.bos.web.action;

import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.HashMap;
import java.util.Map;

import org.apache.poi.ss.formula.functions.T;
import org.springframework.data.domain.Page;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

public abstract class BaseAction<T> extends ActionSupport implements ModelDriven<T>{
	
	//模型驱动
	protected T model;

	@Override
	public T getModel() {
		return model;
	}
	
	//构造器完成model实例化
	public BaseAction(){
		//构造子类Action对象,获取继承父类的型的泛型
		Type genericSuperclass = this.getClass().getGenericSuperclass();
		ParameterizedType parameterizedType  = (ParameterizedType) genericSuperclass;
		//获取类型第一个泛型参数
		Class<T> modelClass = (Class<T>) parameterizedType.getActualTypeArguments()[0];
		try {
			//获取model的值 
			model = modelClass.newInstance();
		} catch (InstantiationException | IllegalAccessException e) {
			e.printStackTrace();
			System.out.println("模型构造失败......");
		}
	}
	
	//接收分页参数
	protected int page;
	protected int rows;

	public void setPage(int page) {
		this.page = page;
	}

	public void setRows(int rows) {
		this.rows = rows;
	}
	
	//将分页查询数据结果压入值栈的方法
	protected void pushPageDataToValueStack(Page<T> pageData){
		Map<String, Object> result = new HashMap<String, Object>();
		result.put("total", pageData.getTotalElements());
		result.put("rows", pageData.getContent());

		ActionContext.getContext().getValueStack().push(result);
	}
}





